https://bugzilla.kernel.org/show_bug.cgi?id=207837

            Bug ID: 207837
           Summary: Dell Vostro 3491 fw 1.8.0 ACPI errors
           Product: ACPI
           Version: 2.5
    Kernel Version: 5.6.13
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: BIOS
          Assignee: acpi_b...@kernel-bugs.osdl.org
          Reporter: ja...@ettle.org.uk
        Regression: No

This is a Dell Vostro 3491 notebook running the latest UEFI firmware. The
following ACPI-related error messages appear shortly after logging into my
desktop environment:


[   54.771734] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x00000003D)
is beyond end of object (length 0x10) (20200110/exoparg2-393)
[   54.771752] ACPI Error: Aborting method \_SB.GINF due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.771756] ACPI Error: Aborting method \_SB.GADR due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.771759] ACPI Error: Aborting method \_SB.SGOV due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.771762] ACPI Error: Aborting method \_SB.CGWR due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.771764] ACPI Error: Aborting method \_SB.TBFP due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.771768] ACPI Error: Aborting method \_SB.WMTF.WMTF due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.776046] ACPI BIOS Error (bug): AE_AML_PACKAGE_LIMIT, Index (0x00000003D)
is beyond end of object (length 0x10) (20200110/exoparg2-393)
[   54.776062] ACPI Error: Aborting method \_SB.GINF due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.776066] ACPI Error: Aborting method \_SB.GADR due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.776069] ACPI Error: Aborting method \_SB.SGOV due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.776072] ACPI Error: Aborting method \_SB.CGWR due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.776075] ACPI Error: Aborting method \_SB.TBFP due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)
[   54.776079] ACPI Error: Aborting method \_SB.WMTF.WMTF due to previous error
(AE_AML_PACKAGE_LIMIT) (20200110/psparse-529)


There are no obvious adverse effects. Seen on the current Fedora kernel
kernel-5.6.13-300.fc32.x86_64, but also present when I tried long-term 5.4 and
4.19 kernels.

Another one I've seen is the following:


[ 7769.786461] ACPI BIOS Error (bug): Could not resolve symbol
[\_SB.PCI0.LPCB.HEC.ECAV], AE_NOT_FOUND (20200110/psargs-330)
[ 7769.786472] ACPI Error: Aborting method \_TZ.FNCL due to previous error
(AE_NOT_FOUND) (20200110/psparse-529)
[ 7769.786482] ACPI Error: Aborting method \_TZ.FN00._ON due to previous error
(AE_NOT_FOUND) (20200110/psparse-529)


which seems related to fan control. I saw it when I tried 

echo 1 > /sys/class/thermal/cooling_device0/cur_state

(The fan seems to be otherwise firmware controlled anyway.)

Obviously these may very well be legit firmware bugs, but I'd rather run it
past the experts before I take it to Dell. Let me know what table dumps etc.
will be required.

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